Marco Marshalloy Mainspring 3242M for AS 1159, 1828, Elgin 747, 794, 887, 937, 974, 975, Omega 43LT1, 43T1, Zodiac 36 - Alloy

Marco Marshalloy Mainspring 3242M for AS 1159, 1828, Alpina 626, Benrus GU2L, Boulevard 830, 870, Derby 40, 40N, Dugena 638, 639, Elgin 747, 794, 887, 937, 974, 975, Endura 567, Fleurier 371N, Omega 43LT1, 43T1, Unitas 200N, 201N, Vulcain 143, Wyler WD13, WD124, Zodiac 36 caliber movements plus perhaps others as well, white alloy, new in envelope. See images for precise mainspring specifications. I likely have several of these so the one you get may differ slightly from the images. I specialize in hard to find watch parts so I usually have whatever you might need and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.